Pen-clamp for multiple-writing machines.



7 P. A. JOHNSON. PEN CLAMP FOR MULTIPLE WRITING MACHINES.

APPLICATION FILED SEPT. 5, 1912.

1,07 3,240. Patented Sept. 16,1913.

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69%M fa 67 g COLUMBIA PYLANOGRAPH CO.,WASHINGTON, D. c.

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FRANK AMOS:JOHNSONaOF'DUIIELLEN, JERSEY, ASSIGNOR TO SIGNATURE GOM- IRANY; OENEW YORK, N; Y., A CORPORATION OF NEW YORK.

rn ivsonnnr ron- MULTIPLE=WBITING maonrnns.

To all whom it may concern:

Be it known that I, FRANK Aiiros JoHN- machines in. which the pens or writing members are rigidly secured to the penbar.

In order to produce uniformity in the signatures it is necessary that all the pens should strike the writing surface at exactly the same time. p

The object of my invention is to provide a penclamp which can be readily adjusted to and from the writing surface; which can be quickly adjusted on the pen-bar in any desired position; which can be easily removed from the pen-bar and from which the pen may be easily and quickly removed.

Reference is made to the accompanying sheet of'drawings.

Figure 1 is a side elevation of the penclamp, showing a pen in position and a small portion of apen-bar, Fig. 2 is a front elevationthe pen bar being shown in section; Fig. 3 is a side elevation-of apen-bar and its guide handle--one pen being shown in position and the position of others beingindicated; Fig. 4 is a sectional side elevation on line XX of Fig. 2; and Fig. 5 is a modified form of the penclamp a portion of the pen bar showing in section.

The pen-bar B is T-shaped and has secured to it a pair of hinge blocks 1, by means of which it is pivotally connected to a pair of arms 2. Only a portion'oit the arms are shown and the manner in which the arms are mounted is not illustrated, as that has no bearing on my present inven tion. The pen-bar is provided on its up per side with a longitudinal slot 3. The pen-clamp O is formed with a horizontal portion at and an oblique portion 5. In this latter portion the pens P are securedby clamp screws 6. Each pen is provided with a band or collar 7. which consists of a spring ring. The joint of the ring 7 is made to aline with aslot 8 of the portion 5 of the pen-clamps when the pens are in right position. On loosening the clamp Specification of Letters Patent. M

the top-of the pen-bar.

Patented-Sept. is, rare.

Applicationfiled Se-ptembrfi, 19 12. Seria1 No.718,6 2.

screw 6 the pen may be readily removed from the clamp and it can be quickly put back in place by inserting the pen as far as the band 7 will permit and by turning the pen until the slots 7 and 8 are in line.

The horizontal portions 4 of the pen clamps havejflanges 45 which extend over In these flanges, near their front ends, are set screws 9 and near the rear ends there are knurled adjusting crews 10. All these screws bear against the pen-bar in its slot 3. Directly under the set screws 9, on the under side of the pen-bar, each clamp has a pin or stud 11 which carries a spring 12, the rear end of which is adapted to bear against the pen-bar directly oppositethe adjusting screws 10. From this construction it can be seen that the front end of the pen-clamp is pivoted to the pen-bar on a horizontal axis and that as the adjusting screws 10 are turned the pen points P will move in the arc a to or from the platen or writing surface IV. The pen points being flexible, the springs 12 are made stilt" enough so that the pressure which is appliedto the pen points in shading will not cause them to yield. When once set the pen clamps are, for all practical purposes, quite rigid.

In Fig. 3 I have shown one pen attached to the pen-bar and have indicated by lines being moved and still not interfere with the rocking action of the pen-clamps as the adjusting screws 10 are turned.

Various modifications of the construction just described may be made. One form is shown in Fig. 5, where a lug 13 is substituted for the set screw 9.

It will be evident that with either form of clamp herein described, that they may be placed on the pen-bar in any desired position and that they may be easily removed from thebar by sliding to either end.

My improvedconstruction of pen-clamp permits the quick setting up of the writing machine with any desired number of pens, in any desired position on the pen-bar and the pens can be quickly adjusted to the writing surface and held in an effective manner.

' What I claim is:

1. In a machine of the class referred to, a pen-bar; a plurality of pen-clamps mounted thereonsaid pen-clamps being each adapted to hold a writing member-one end of each of said pen-clamps having a pivotal axis on said pen-bar; in combination with means for adjusting the opposite or free end of said pen-clamps in a vertical direced thereon'0ne end of each of said penclamps having a horizontal pivotal axis on said penbar; in combination with a spring attached to each of said pen-clamps and adapted to draw the outer or free ends of said pen clamps downward toward said pen-bar and adjusting screws in the outer or 'free ends of said pen-clamps for adjusting said free ends to and from said pen-bar.

4:. In a machine of the class referred to, a pen-bar having a longitudinal slot; a plurality of pen-clamps mounted on said penbar-one end of each of said pen-clamps being provided with a projection on one side of said pen-bar and a set screw on the opposite side of said pen-barsaid set screw being adapted to enter the slot in said pen-barsaid projections and said set screws engaging said pen-bar to form horizontal pivotal axes; for said penclamps; in combination'with a spring on each of said pen-clamps which springs are adapted to draw the free end of said pen-clamps t0- ward said pen-bar and an adjusting screw in the free ends of said pen clamps which screws areadapted to enter the longitudinal slot of said pen-bar. s p

5. In amachine of the class referred to,

a pen-bar; aplurality of pen-clamps mount ed thereonyeach adapted to be rocked ona horizontal axis-"withrelation to said penba-r and to be'moved longitudinally on said pen-bar; in combination with a spring on each of said pen-clamps which is adapted to rock said pen clamps with relation to said pen-bar and means for rocking said penclamps against the tension of said springs said springs serving the additional ofiice' of holding said pen-clamps in theirjlongitudinal position on said pen-bar.

6. In a machine of the class referred to,

a pen-bar; a pen-clamp having a pivotal axis slidable with relation to said pen-bar and adapted to hold a writing member; in' comblnatlon with means for rocking said pen-clamp on its axiswith relation to said i pen-bar, whereby the pen may be adjustably secured in its position. on the pen bar' and in relation to the writingsurface. e In testimony whereof I ailix my signature in presence of two witnesses.

F. AMOS JOHNSON. l/Vitnesses:

MICHAEL J. KING, T. O. MAOKINNON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

